respiration — respirational, adj. /res peuh ray sheuhn/, n. 1. the act of respiring; inhalation and exhalation of air; breathing. 2. Biol. a. the sum total of the physical and chemical processes in an organism by which oxygen is conveyed to tissues and cells,… … Universalium

respiration — [res΄pə rā′shən] n. [ME respiracioun &LT; L respiratio &LT; respiratus, pp.] 1. act or process of respiring; breathing; inhaling and exhaling air 2. the processes by which a living organism or cell takes in oxygen from the air or water,… … English World dictionary